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There are certain problems that just make sense to solve using Java Recursion. Demonstrating Fibonacci Series is one of them. Let’s take a look at something called Fibonacci series. Here are the first few numbers of this series:
0, 1, 1, 2, 3, 5, 8, 13, 21…

Now stop reading and try to figure out what’s going on or let’s walk thru the sequence together and see how it works:

To obtain the sequence, we start with 0 and 1 after which
every number is the sum of the previous two numbers.

For example, the first two numbers will be 0 and 1

0, 1

For the next number, we add the previous two numbers 0 and 1
which gives one.